Sayyiduna Ali (may Allah be pleased with him) narrates that he was present with the Prophet (peace and blessings be upon him), and he asked: "What thing is best for a woman?" The people remained silent. Sayyiduna Ali (may Allah be pleased with him) says: When I went home, I asked Fatimah: "What thing is best for women?" She replied: "That men do not see them." Sayyiduna Ali (may Allah be pleased with him) says: I mentioned this to the Prophet (peace and blessings be upon him), and he said: "Fatimah is a part of me."
Al-Bazzar recorded it; its chain contains a narrator whom I do not know, and also a narrator, Ali bin Zayd.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب النكاح / 7328